One fine day, RunCloud Suddenly Stops Talking to Your Server. When this incident occurred. I logged into RunCloud expecting the usual green lights, and instead I saw a red “security-bannedip” error. For a second, I thought I’d broken something serious. If you’re seeing the same message
RunCloud Agent “security-bannedip”. Unable to communicate with Server (x.x.x.x)
don’t panic. It almost always comes down to a simple connection issue.
Below is what I’ve learned from fixing this more than once.
1. Check whether the Server Is still online
For this. Open a terminal and ping the server:
ping your.server.ip
If it doesn’t answer, it’s probably offline or rebooting or under maintenance. When that happens, RunCloud can’t reach it, so the agent gives up. Wait a few minutes or contact SupportPRO Server Admin
2. Look at the Firewall
Most of the time, the culprit is a firewall rule that’s a little too strict.
RunCloud needs a few doors open to talk to your machine:
- 22 (SSH)
- 80 (HTTP)
- 443 (HTTPS)
- 34210 (RunCloud agent)
Run an nmap scan from another machine to be sure they’re open.
If you find them blocked, allow those ports or whitelist RunCloud’s IP range. Once that’s done, communication usually comes back within seconds.
3. Watch the Server’s Resources
If your server is gasping for air, high CPU, low memory, it might start dropping requests, including RunCloud’s.
From your console run:
top
If everything’s pegged at 100%, stop heavy processes or restart any runaway service. After that, check RunCloud again. I’ve seen the agent reconnect almost immediately once load drops.
4. Undo Recent Package Changes
RunCloud installs its own tuned versions of nginx, Apache, and PHP (the ones ending in -rc). Mixing in outside packages can confuse things badly.
If you recently installed a non-RC package or upgraded something manually, roll it back or remove it. A quick restart of the RunCloud agent afterward usually clears the problem.
5. Don’t Forget the Network Side
Sometimes it’s nothing on your server at all maybe a routing hiccup, bad DNS cache, or ISP-level filter. Try rebooting the network interface or running a traceroute:
traceroute runcloud.io
If packets stop halfway, it’s a network issue. SupportPRO can help resolve this. RunCloud will reconnect automatically, though you can also restart the agent yourself:
sudo runcloud-agent restart
Quick Recap
- Ping the server.
- Check ports 22, 80, 443, and 34210.
- Review CPU and RAM usage.
- Remove conflicting packages.
- Verify network and DNS.
Most “security-bannedip” errors disappear once one of those steps is fixed.
If You’re Still Stuck
Sometimes everything looks right, and the error won’t clear. In that case, ping SupportPRO, and we can usually spot something in the logs that you can’t see from the dashboard.
If you’d rather not wrestle with it alone, our team can step in. We deal with RunCloud connection problems every week and can help you sort it out quickly so you can get back to deploying sites instead of debugging them.
Still having trouble or need some help? Don’t hesitate to reach out – we’re here to assist you every step of the way!!!
Partner with SupportPRO for 24/7 proactive cloud support that keeps your business secure, scalable, and ahead of the curve.
